Gate-valve.



PATENTED AUG. 28, 1906. J. H. BAKER, G. F. SHEVLIN & F. H. BAKER.

GATE VALVE.

APPLICATION FILED JUNE 10, 1905.

2 SHEETS-SHEET 1.

WIT E55 E5 VTTY 1n: norms PETERS ca. WASHINOTdfV- n. c.

' an Improvement in Gate-Valves, of which.

OFFICE.

JAMES H. BAKER, GEORGE F. SHEVLIN, AND FREDERICK H. BAKER, OF

SARATOGA sPRiNes, NEW YORK. AssioNoRs TO BAKER & SHEVLIN COMPANY, OFSARATOGA sPRlNes, NEW.YORK, A CORPORATION OF NEW YORK.

GATE-VALVE;

Specification of Letters Patentt Patented Au 28, 906.

Application filed June 10, 1905- Serial No- 264.581.

To (Lt/Q whom it may concern.

Be it known that we, JAMES H. BAKER, GEORGE F. Si-IEVLIN, and FREDERIcKH. BAKER, citizens of the United States, residing at Saratoga Springs,in the county of Saratoga and State of New York, have invented thefollowing is a specification.

In sulfite-pulp mills the sulfite-p'ulp is discharged from the digestersinto the blow-pits, and it carries with it a large percentageofsi1lfuric acid. This acid usually leaks past the closed gate of thevalve on the blow-pits or stuff-chests and runs on into the line ofpiping and into the pumps and therein said acid eats into the metal ofthe pipes and pumps and causes an expensive and unnecessary wasting awayand weakening of the same, besides destroying their useful life; and theobject of our invention is to overcome this difficulty.

Our invention relates to the gate-valve placed on the blow-pit orsti'iff-chests and which is in the line of pipes betweenthe same and thepumps. This gate-valve may be single or double and when constructedaccord ing to our invention comprises means for trapping that part ofthe acid which leaks past the gate when closed and diverting the samefrom the piping and pumps.

In carrying out our invention we preferably employ a valve comprising abody portion, a flange provided with an intake-nozzle for one side ofsaid body, a bonnet provided with an outlet-nozzle for the other side ofsaid body, a gate or gates, means for operating the same, a trap in thelower portion of the valve-body adjacent to one gate, and means foropening and closing the passages from said trap.

In the drawings, Figure 1 is a front elevation of the simpler form ofour improved gatevalve, and Fig. 2 is a side elevation of the same. Fig.3 is a front elevation of the preferred form of our invention, and Fig.4 is a side elevation of the same. Figs. 5 and 6 are views,respectively, of the opposite sides of the valve-body. Fig. 7 is acentral vertical section of the valve-body, and Fig. 8 is a plan of thesame.

Similar reference characters denote similar parts in the respectivefigures.

a designates the valve-body, which is provided with suitable flanges a(L to which are secured, respectively, the frontflange b and the bonnetc. The flange b is provided with an inlet-nozzle 1), adapted to beconnected to a blow-pit or stuff-chest, and the bonnet c is providedwith an outlet-nozzle 0, preferably circular and adapted to be connectedto the pipingleading to the pumps.

the gate (1, operated by the gate-stem (P, which passes through thecover e and stuffingbox 6, and when the valve is closed thegate In thevalvebody there is a gateway (1, adapted to receive d .restson the face2, extending across. the

lower portion of the opening in the valve:

body and against its seat 3, surrounding. the

said opening in the valve-body.

As indicated in Fig. 4, the bonnet c ispreferably provided with agateway f, in which a.

gate f is. operated by the stem f passing through the cover it andstufiing h.

In the lower part of the valve-body and at I the bottom of the openingtherein weprovide a trap or recessed portion t intermediate of the gatesand extending across the entire valve-body and terminating in openings 45 in the valve-body, and which openings may be interiorly screw-threadedand fitted with cocks or auxiliary valves 6 7, respectively.

In the use of our improved valve the cooks 6 and 7 are closed when thegates d f are open and the cooks 6 and 7 open when the valve-gates areclosed, whence it will be apparent that any and all acid which may leakby the gate (1 when closed will descend to the trap 'L and from there beconveyed away to a waste or suitable receptacle, and thus be divertedfrom the pumps and piping leading thereto.

It will also be understood that while we have shown and prefer to employthe doublegate construction we do not limit ourselves to this, structureas it is manifestly within the' an inlet-nozzle thereon, a gate in saidbody portion and means in said body portion at the side of the said gateopposite the inletnozzle and at the other side of the seat for the saidgate for trapping and conveying away that part of the liquid which leaksby the said gate.- 4

2. A gate-valve comprising a body portion, an inlet-nozzle thereon, agate, a seat in the said body portion for the said gate and a trap alsoin the said body portion at the side of the said gate opposite theinlet-nozzle and on the other side of the'said seat for trapping andconveying away that part of the liquid which leaks by the gate whenclosed.

3. A gate-valve comprising a body portion independently operated, gatestherein, means for operating said gates, and means intermediate of saidgates for trapping and conveying away that part of a liquid which leaksby the gate on the inlet side.

4. A gate-valve comprising a body portion having an opening and gatewaytherein, a cover, a flange secured to one face of the body portion, abonnet secured to the other face of said body portion and provided witha gateway, gates located respectively in the gateways in said bodyportion and bonnet, stems for said gates, and means intermediate of saidgates for trapping and conveying away that part of a liquid which leaksby the inlet gate.

5. A gate-valve comprising a body portionhaving an opening and gatewaytherein, a cover, a flange secured to one face of the body portion, abonnet secured to the other face of said body portion and provided witha gate- Way, an inlet-nozzle on said flange, an outletnozzle on saidbonnet, gates located respectively in the gateways in said body portionand bonnet, stems for said gates, and means intermediate of said gatesfor trapping and conveying away that part of a liquid which tively inthe gateways in said body portion and bonnet, stems for said gates, atrap extending across said body portion mterlnediate of said gates, andmeans for opening and closing the outlets from said trap.

7. A gate-valve comprising a body portion having an opening and gatewaytherein, a cover, a flange secured to one face of the body portion, abonnet secured to the other face of said body portion and provided witha gateway, an inlet-nozzle on said flange, an outlet nozzle on saidbonnet, gates located respectively in the gateways in said body portionand bonnet, stems for said gates, a trap eX-' tending across said bodyportion intermediate of said gates, and cocks secured in the outlets ofsaid trap for opening and closing the same.

Signed by us this 24th day of May, 1905.

JAMES H. BAKER. GEORGE F. SHEVLIN.

. FREDERICK H. BAKER.

Witnesses:

WILLIAM J DELANEY, B. G. FARRINGTON.

